CN204799939U - Immersion nozzle structure - Google Patents
Immersion nozzle structure Download PDFInfo
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- CN204799939U CN204799939U CN201520476987.4U CN201520476987U CN204799939U CN 204799939 U CN204799939 U CN 204799939U CN 201520476987 U CN201520476987 U CN 201520476987U CN 204799939 U CN204799939 U CN 204799939U
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- delivery port
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- crystallizer
- gate structure
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Abstract
The utility model discloses an immersion nozzle structure, include: be provided with delivery port and mesoporous mouth of a river structure body, the delivery port sets up mouth of a river structure body lower extreme, the up end of delivery port is 60 5 with the contained angle of horizontal plane, the lower terminal surface of delivery port is 15 1.5 with the contained angle of horizontal plane, the mesopore sets up mouth of a river structure body center, and with the delivery port intercommunication, mouth of a river structure body sets up between centre package and crystallizer, molten steel in the middle package is followed the mesopore flows in mouth of a river structure body is followed the delivery port flows and gets into in the crystallizer. The utility model provides an immersion nozzle structure who crosses is through the mouth of a river export angle of optimizing for the steel flows and have better flow and stability in the crystallizer, reduces the phenomenon that takes place to roll up the sediment, has reduced the unstable state of molten steel liquid level, thereby has improved the quality of slab.
Description
Technical field
The utility model relates to continuous cast mold mouth of a river technical field, particularly a kind of immersion type water nozzle structure.
Background technology
Crystallizer submersed nozzle between tundish and crystallizer, is that molten steel flows to the mozzle of crystallizer from tundish in continuous casting process, and its effect is: prevent secondary oxidation of steel; Control flow regime and the injection rate of molten steel; Promote inclusion floating, prevent covering slag non-metallic inclusion to be involved in molten steel, it is the visual plant controlling to water steel in casting process.Along with the progress of science and technology, the industry such as automobile, household electrical appliances is more and more high to the requirement of flat cold-rolled sheet surface quality, and this just requires that the amount of inclusions causing surface of cold-rolled steel plate defect in strand reduces.Slag is the major defect affecting flat cold-rolled sheet surface quality, and quantity and the crystallizer flow field of blank surface Large Inclusions are unreasonable, and liquid fluctuating is comparatively large all relevant with slag, and reasonably submersed nozzle is the key factor affecting crystallizer flow field.
Crystallizer surface flow velocity is the key feature of free surface, and surface velocity is crossed conference and caused being involved in of solid-state or liquid covering slag, but the too small meeting of surface velocity causes crystallizer meniscus place liquid steel temperature too low, affects the lubricant effect of covering slag.Current submersed nozzle casting cycle molten steel surface velocity is higher unreasonable, easily causes the generation of strand slag phenomenon.
Due to the guide effect of the outlet convection current stock of submersed nozzle, submersed nozzle exit angle is very large to the flow of molten steel, and exit angle increases, and the degree of depth that stream stock impacts leptoprosopy becomes large, and intensity and the energy of upper backflow are little, and the flow velocity at meniscus place diminishes simultaneously.Namely exit angle is larger, and upper backflow is more undeveloped, and from the floating of field trash, exit angle is larger, and the field trash that stream stock carries can be flushed to crystallizer depths, causes its difficulty that floats.Therefore, consider upper circulating flow strength and inclusion floating remove between relation, reasonably the exit angle of design submersed nozzle becomes the major issue needing to solve.
Utility model content
The embodiment of the present application is by providing a kind of immersion type water nozzle structure, solve the submersed nozzle casting cycle molten steel surface velocity occurred in current continuous casting production process higher unreasonable, the technical problem easily causing strand slag phenomenon to occur, achieves the technique effect that steel stream has better flowing and stability in crystallizer.
The utility model provides a kind of immersion type water nozzle structure, comprising: the gate structure body being provided with delivery port and mesopore;
Described delivery port is arranged on described gate structure body lower end, and the upper surface of described delivery port and the angle of horizontal plane are 60 ° ± 5 °, and the lower surface of described delivery port and the angle of horizontal plane are 15 ° ± 1.5 °;
Described mesopore is arranged on described gate structure body central, and described mesopore is communicated with described delivery port;
Described gate structure body is arranged between tundish and crystallizer, and the molten steel in described tundish flows into described gate structure body from described mesopore, flows out enter described crystallizer from described delivery port.
Further, the bottom of described gate structure body is provided with groove.
Further, described delivery port has two, and two described delivery ports are arranged on the both sides of described gate structure body, and near described gate structure body bottom portion.
Further, the area equation of two described delivery ports.
Further, described mesopore is rounded, and diameter is 72mm.
A kind of immersion type water nozzle structure that the utility model provides, at least has following technique effect or advantage:
1, the mesopore of immersion type water nozzle structure is set to circle, molten steel temperature field and flow field in continuous casting crystallizer for plate billet are improved.
2, the delivery port upper surface of immersion type water nozzle structure and the angle of horizontal plane are designed in 60 ° ± 5 °, the lower surface of delivery port and the angle of horizontal plane design in 15 ° ± 1.5 °, significantly can reduce the flow velocity of liquid level, reduce slag odds, make steel stream in crystallizer, have better flowing and stability, reduce the labile state of liquid steel level, thus improve the quality of slab.
Accompanying drawing explanation
The immersion type water nozzle structure sectional view that Fig. 1 provides for the utility model embodiment;
The structural representation of the delivery port in the immersion type water nozzle structure that Fig. 2 provides for the utility model embodiment.
Detailed description of the invention
Larger in order to solve the liquid level fluctuation of crystallizer occurred in continuous casting production process, the technical problems such as melt cinder skewness and slag entrapment in mold, the water-gap outlets angle of a kind of immersion type water nozzle structure that the utility model embodiment provides by optimizing, make mold liquid level molten steel have certain flow velocity and reduce the phenomenon that slag occurs, make steel stream in crystallizer, have better flowing and stability, reduce the labile state of liquid steel level, thus improve the quality of slab.
See Fig. 1, a kind of immersion type water nozzle structure that the utility model embodiment provides comprises: the gate structure body 1 being provided with delivery port 3 and mesopore 2, described delivery port 3 is arranged on described gate structure body 1 lower end, described mesopore 2 is arranged on the center of described gate structure body 1, and is communicated with described delivery port 3.
In order to improve molten steel temperature field and flow field in continuous casting crystallizer for plate billet, reduce the flow velocity of liquid level, reduce slag odds, the described upper surface of delivery port 3 and the angle of horizontal plane are 60 ° ± 5 °, and the lower surface of described delivery port 3 and the angle α of horizontal plane are 15 ° ± 1.5 °.When the described upper surface of delivery port 3 and the angle of horizontal plane are 60 °, when the lower surface of described delivery port 3 and the angle α of horizontal plane are 15 °, Fluid field effect and angle of attack are suitable for, and liquid fluctuating is little.
Described gate structure body 1 is arranged between tundish and crystallizer, and the molten steel in described tundish flows into described gate structure body 1 from described mesopore 2, flows out enter described crystallizer from described delivery port 3.The bottom of described gate structure body 1 is provided with groove.Described delivery port 3 has two, and two described delivery ports 3 are arranged on the both sides of described gate structure body 1, and bottom described gate structure body 1.Delivery port 3 is asymmetric or misalign the non-uniform flow that also can cause Mold, and two vortexs are formed on the Free Surface of both sides, the mouth of a river, this vortex is easier than liquid fluctuating causes slag, and two delivery ports 3 therefore in the utility model embodiment are symmetricly set on the both sides of described gate structure body 1.The area equation of two described delivery ports 3.See Fig. 2, single go out discharge area be 4800mm
2, be wide W60mm × high H80mm.Mesopore 2 is rounded, and diameter phi is 72mm.By numerical simulation and on-the-spot application, by calculating mouth of a river steel-passing amount and delivery port 3 and water inlet area ratio, to calculate 72mm comparatively suitable.
A kind of immersion type water nozzle structure that the utility model provides, at least has following technique effect or advantage:
1, the bottom of immersion type water nozzle structure is provided with groove, and mesopore 2 is set to circle, improves molten steel temperature field and flow field in continuous casting crystallizer for plate billet.
2, delivery port 3 upper surface of immersion type water nozzle structure and the angle of horizontal plane are 60 ° ± 5 °, and the lower surface of delivery port 3 and the angle of horizontal plane are 15 ° ± 1.5 °, the area equation of two delivery ports 3, and the area of single delivery port 3 is 4800mm
2, be 60mm × 80mm, significantly can reduce the flow velocity of liquid level, reduce slag odds, make steel stream in crystallizer, have better flowing and stability, reduce the labile state of liquid steel level, thus improve the quality of slab.
The intrusive mood gate structure that the utility model embodiment provides carries out in the process applied in conjunction with actual continuous casting manufacturing technique, first the ladle that the good molten steel of refining is housed is transported to panoramic table, after panoramic table turns to pouring position, molten steel is injected tundish.Because the insertion depth of intrusive mood gate structure and blow Ar amount flow-control, very large on the impact of crystallizer flow field, and be directly connected to the stream shock point of stock to leptoprosopy and the form in flow field, the degree of depth that the intrusive mood gate structure that the utility model embodiment provides inserts crystallizer is 125-165mm, and it is <12L/min that Ar amount control range is always blown on three roads.Mesopore 2 in the intrusive mood gate structure that molten steel in tundish is provided by the utility model embodiment again flows into, then flows out through delivery port 3, is assigned to by molten steel in each crystallizer and goes, molten steel casting forming quick solidification crystallization in a crystallizer.Last withdrawal straightening machine and crystallizing vibration device acting in conjunction, by the foundry goods pull-out in crystallizer, after cooling, electromagnetic agitation, cut into the slab of certain length.
It should be noted last that, above detailed description of the invention is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail the utility model with reference to example, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (5)
1. an immersion type water nozzle structure, is characterized in that, comprising:
Be provided with the gate structure body of delivery port and mesopore;
Described delivery port is arranged on described gate structure body lower end, and the upper surface of described delivery port and the angle of horizontal plane are 60 ° ± 5 °, and the lower surface of described delivery port and the angle of horizontal plane are 15 ° ± 1.5 °;
Described mesopore is arranged on described gate structure body central, and described mesopore is communicated with described delivery port;
Described gate structure body is arranged between tundish and crystallizer, and the molten steel in described tundish flows into described gate structure body from described mesopore, flows out enter described crystallizer from described delivery port.
2. immersion type water nozzle structure as claimed in claim 1, is characterized in that:
The bottom of described gate structure body is provided with groove.
3. immersion type water nozzle structure as claimed in claim 1, is characterized in that:
Described delivery port has two, and two described delivery ports are arranged on the both sides of described gate structure body, and near described gate structure body bottom portion.
4. immersion type water nozzle structure as claimed in claim 3, is characterized in that:
The area equation of two described delivery ports.
5. immersion type water nozzle structure as claimed in claim 1, is characterized in that:
Described mesopore is rounded, and diameter is 72mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520476987.4U CN204799939U (en) | 2015-07-03 | 2015-07-03 | Immersion nozzle structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520476987.4U CN204799939U (en) | 2015-07-03 | 2015-07-03 | Immersion nozzle structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204799939U true CN204799939U (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520476987.4U Active CN204799939U (en) | 2015-07-03 | 2015-07-03 | Immersion nozzle structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710361A (en) * | 2016-04-05 | 2016-06-29 | 本钢板材股份有限公司 | Submersed nozzle for wide slab continuous casing machine |
| CN108920821A (en) * | 2018-06-30 | 2018-11-30 | 马鞍山钢铁股份有限公司 | A kind of steel-making continuous casting intrusive mood flowing water mouth and its method for numerical simulation |
-
2015
- 2015-07-03 CN CN201520476987.4U patent/CN204799939U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105710361A (en) * | 2016-04-05 | 2016-06-29 | 本钢板材股份有限公司 | Submersed nozzle for wide slab continuous casing machine |
| CN108920821A (en) * | 2018-06-30 | 2018-11-30 | 马鞍山钢铁股份有限公司 | A kind of steel-making continuous casting intrusive mood flowing water mouth and its method for numerical simulation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee after: Shougang Group Co. Ltd. Address before: 100041 Shijingshan Road, Beijing, No. 68, No. Patentee before: Capital Iron & Steel General Company |